Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The arrival of December coincides with an average high-temperature of a frosty 8.4°C (47.1°F), indicating a minimal shift from November's 10.9°C (51.6°F). During December, Harwich perceives a slight decrease in temperature from daytime highs, settling at an average low of 5.5°C (41.9°F).Humidity
January and December, with an average relative humidity of 84%, are the most humid months.Rainfall
In Harwich, in December, during 15.1 rainfall days, 40mm (1.57") of precipitation is typically accumulated. Throughout the year, in Harwich, there are 168.5 rainfall days, and 389mm (15.31") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Harwich, in December, snow falls for 1.5 days, with typically accumulated 7mm (0.28") of snow. In Harwich, during the entire year, snow falls for 9.4 days and aggregates up to 53mm (2.09") of snow.Sea temperature
In Harwich, the average seawater temperature in December is 10.8°C (51.4°F).Note: Unprotected swimming in 10.8°C (51.4°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.
Daylight
The month with the shortest days is December, with an average of 7h and 54min of daylight.On the first day of the month, sunrise is at 7:40 am and sunset at 3:47 pm. On the last day of December, sunrise is at 8:02 am and sunset at 3:53 pm GMT.
Sunshine
The average sunshine in December is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
How cold is the water in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Harwich have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Harwich, United Kingdom
- Average high temperature in December: 8.4°C
The warmest month (with the highest average high temperature) is August (20°C).
The month with the lowest average high temperature is January (7°C).
- Average low temperature in December: 5.5°C
The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is January (4°C).
Average pressure in December
Harwich, United Kingdom
- Average pressure in December: 1014.1mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in December
Harwich, United Kingdom
- Average wind speed in December: 26.4km/h
The windiest month (with the highest average wind speed) is December (26.4km/h).
The calmest month (with the lowest average wind speed) is July (17.2km/h).
Average humidity in December
Harwich, United Kingdom
- Average humidity in December: 84%
The months with the highest relative humidity are January and December (84%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
Harwich, United Kingdom
- Average rainfall in December: 40mm
The wettest month (with the highest rainfall) is October (46mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in December
Harwich, United Kingdom
- Average rainfall days in December: 15.1 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is September (11.8 days).
Average snowfall in December
Harwich, United Kingdom
- Average snowfall in December: 7mm
The month with the highest snowfall is February (22mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Harwich, United Kingdom
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Harwich, United Kingdom
- Average sea temperature in December: 10.8°C
The best month for swimming (with the highest average sea temperature) is September (17.7°C).
The coldest month (with the lowest average sea temperature) is March (7.2°C).
Average daylight in December /
Average sunshine in December
Harwich, United Kingdom
- Average daylight in December: 7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in December
Harwich, United Kingdom
- Average sunshine days in December: 12.5 days
The months with the most sunshine days are April and September (15.1 days).
The month with the least sunshine days is February (11.1 days).
Average UV index in December
Harwich, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Harwich, United Kingdom
- Average cloud cover in December: 57
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 41).
Average visibility in December
Harwich, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
